Finite volume model for steady-state transverse mixing in streams / Z. Ahmed in Journal of hydraulic research, Vol. 46 extra issue (2008)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 46 extra issue (2008) . - p. 72-80 Titre : Finite volume model for steady-state transverse mixing in streams Titre original : Modèle en volume fini pour le mélange transversal dans les courants en régime permanent Type de document : texte imprimé Auteurs : Z. Ahmed, Auteur Article en page(s) : p. 72-80 Note générale : Hydraulique Résumé en Français Langues : Anglais (eng) Mots-clés : Stream Polluant Transverse mixing Finite volume method Mixing coefficient Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Transverse mixing is arguably more important in water quality management than either vertical or longitudinal mixing, especially when dealing with the discharge of pollutants from point sources or the mixing of tributary inflows. A finite volume model with upwind scheme is developed to solve the equation for transverse mixing in steady flow in prismatic channel. The model takes care of variation of transverse mixing coefficient across the channel width. The model has been verified with analytical solutions for constant mixing coefficient and for pollutant injection in the middle and near the bank of streams. The model is inherently mass conservative and captures successfully the discontinuity existing at the upstream boundary. Effect of variable transverse mixing coefficient on the pollutant concentration profiles has been shown for a typical cross-section of the Lesser Slave River. It is found that the computed concentration profiles for variable transverse mixing coefficient are significantly different from those for constant coefficient. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Finite volume model for steady-state transverse mixing in streams = Modèle en volume fini pour le mélange transversal dans les courants en régime permanent [texte imprimé] / Z. Ahmed, Auteur . - p. 72-80. Hydraulique Résumé en Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 46 extra issue (2008) . - p. 72-80 Mots-clés : Stream Polluant Transverse mixing Finite volume method Mixing coefficient Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Transverse mixing is arguably more important in water quality management than either vertical or longitudinal mixing, especially when dealing with the discharge of pollutants from point sources or the mixing of tributary inflows. A finite volume model with upwind scheme is developed to solve the equation for transverse mixing in steady flow in prismatic channel. The model takes care of variation of transverse mixing coefficient across the channel width. The model has been verified with analytical solutions for constant mixing coefficient and for pollutant injection in the middle and near the bank of streams. The model is inherently mass conservative and captures successfully the discontinuity existing at the upstream boundary. Effect of variable transverse mixing coefficient on the pollutant concentration profiles has been shown for a typical cross-section of the Lesser Slave River. It is found that the computed concentration profiles for variable transverse mixing coefficient are significantly different from those for constant coefficient. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

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